OPTIMIZATION OF BEPC POSITRON SOURCE

PEI Guo-Xi; XIE Jia-Lin; ZHOU Shu; SUN Song-Lan

Chinese Physics C> 1990, Vol. 14> Issue(2) : 110-117

OPTIMIZATION OF BEPC POSITRON SOURCE

Institute of High Energy Physics,Academia Sinica,Beijing

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Abstract：
Based on Monte-Carlo simulation and particle tracking,the positron source of BEPC is designed and the predicted performance is compared with experimental measurement with good agreement.Important conclusions can be drawn from the study presented in this paper,such as up to 10A increase in electron gun current is beneficial in spite of the deterioration effect on the beam spot size at the target; positron current increase with the bridge coil and solenoid currents of the positron of matching field peak to the target; the existance of the injection phased and their significance; the electron and positron from the target do not have to be separated and the R.F. separator is not necessary etc.The above results serve the purpose of directing the tune-up and operation of BEPC,providing a useful reference for future design of positron accelerators.

References

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D.E.Yount and J. Pin "Production of Positrons with the Stanford Mark III Accelerator" Nucl. lnstr.Meth., 15(1962), 145.[2] D. E. Yount "Positron Beams", Physics Today, February,1969.[3] J. Miller et al., J. Phys. Radi., 21(1960), 296[4] D. E. Lobb "A Study of a Focussing System for positron Beams", SLAC-5.[5] I. Sati "Positron Generator Linac" Proc. The Meeting on Linear Accelerator in Japan (1982)[6] R. Boni et al. "A New System for Positron Focussing at the FRASCATI Linac" LNF-81/6(R), 28 Gennato 1981.[7] R. B. Neal et al. The Stanford Two-mile Accelerator.[8] Xie JiaLin "On the Chocie of Positron Producing Energy in Linac injected esup+/sup Colliders" IEEE NS-32,5(1985), P. 3080[9] R . L. Ford and W. R. Nelson "The EGS Code System:Computer Programs for the Monte-Carlo Simula-tion of Electromagnetic Cascade Showers"SLAC210,UC-32. June 1978.[10] H. L. Lynch et al. "Design of a High Yield Positron Source" SLAC-PUB-3635, April 1985.[11] Wu WenTai, private communication.[12] K. L. Brown et al. "TRANSPORT: A Computer Program for Designing Charged Particle Beam Transport Systems" SLAC-91, UC-28(I/A).[13] H. Leboutet "Estimation of the Number of Positrons Which Can Be Focussed into the Accelerator" (lecture).[14] Cao Wei et al. "Tests of Pulse Magnetic Field Profiles of BEPC Positron Source" (inner report).[15] Luo Ying Xiong et al "A computer Program TRAJE for Designing the Positron Collection Systems" (in ner report).[16] P. F. Meads, jr. Rev. Sci. Instr., 38(1967), 1752[17] K. Hiibner, "Positron Production for Particle Accelerators", CERN/PS/88-19 (LP), 1988[18] Pei Guoxi, LILY Programme, (internal report), 1986.

[1] GUO Yun-Jun , HE Kang-Lin . Muon Identification Using the Efficiencies Ratio Method at BESⅡ. Chinese Physics C, 2007, 31(11): 1050-1055.
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PEI Guo-Xi, XIE Jia-Lin, ZHOU Shu and SUN Song-Lan. OPTIMIZATION OF BEPC POSITRON SOURCE[J]. Chinese Physics C, 1990, 14(2): 110-117.

PEI Guo-Xi, XIE Jia-Lin, ZHOU Shu and SUN Song-Lan. OPTIMIZATION OF BEPC POSITRON SOURCE[J]. Chinese Physics C, 1990, 14(2): 110-117. shu

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Received: 1900-01-01
Revised: 1900-01-01

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沈阳化工大学材料科学与工程学院沈阳 110142

OPTIMIZATION OF BEPC POSITRON SOURCE

Corresponding author: PEI Guo-Xi,

Institute of High Energy Physics,Academia Sinica,Beijing

Received Date: 1900-01-01
Accepted Date: 1900-01-01
Available Online: 1990-02-05

Abstract: Based on Monte-Carlo simulation and particle tracking,the positron source of BEPC is designed and the predicted performance is compared with experimental measurement with good agreement.Important conclusions can be drawn from the study presented in this paper,such as up to 10A increase in electron gun current is beneficial in spite of the deterioration effect on the beam spot size at the target; positron current increase with the bridge coil and solenoid currents of the positron of matching field peak to the target; the existance of the injection phased and their significance; the electron and positron from the target do not have to be separated and the R.F. separator is not necessary etc.The above results serve the purpose of directing the tune-up and operation of BEPC,providing a useful reference for future design of positron accelerators.